User`s manual

Beijing ART Technology Development Co., Ltd. V6.032

Chapter 2 Parameter Configuration

We have three ways to configure parameters of A-GPRS1090I: these are local COM port configuration, long-distance

configuration and message configuration.

2.1 Local Serial Port Configuration

There two configuration methods: GPRS-Config.exe configuration program or AT command.

There are two ways can enter to the local configuration mode, show as follows.

1 When DTU power-on: when give the power to DTU, it will check whether there is space in the serial port, if there is

space, that the user requested access to the configuration mode. Therefore, we only need to send space to serial port

continuously before give the power to DTU (baud rate 115200, 8-bit data bit, 1 stop bit, noparity), and then give the

power to DTU, you can enter the local serial port configuration mode.

Note: If it receives character “e” when give the power to DTU, it will rest DTU; if it receives character “a”, we can do

AT mandate for SIM300.

2 When DTU normal working: when DTU is in a normal communication status, we can send characters in table 2.1 to

DTU through serial port to make DTU exit present work mode, and then enter the configuration mode.

Table2.1

Pre-idle time Character Idle interval time

Least 100ms +++ is set \r\n Least 100ms